drivers/gpu/drm/i915/display/intel_connector.c

   1 /*
   2  * Copyright (c) 2007 Dave Airlie <[email protected]>
   3  * Copyright (c) 2007, 2010 Intel Corporation
   4  *   Jesse Barnes <[email protected]>
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the next
  14  * paragraph) shall be included in all copies or substantial portions of the
  15  * Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  22  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  23  * DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 #include <linux/i2c.h>
  27 #include <linux/slab.h>
  28
  29 #include <drm/drm_atomic_helper.h>
  30 #include <drm/drm_edid.h>
  31
  32 #include "i915_drv.h"
  33 #include "intel_backlight.h"
  34 #include "intel_connector.h"
  35 #include "intel_display_debugfs.h"
  36 #include "intel_display_types.h"
  37 #include "intel_hdcp.h"
  38 #include "intel_panel.h"
  39
  40 int intel_connector_init(struct intel_connector *connector)
  41 {
  42         struct intel_digital_connector_state *conn_state;
  43
  44         /*
  45          * Allocate enough memory to hold intel_digital_connector_state,
  46          * This might be a few bytes too many, but for connectors that don't
  47          * need it we'll free the state and allocate a smaller one on the first
  48          * successful commit anyway.
  49          */
  50         conn_state = kzalloc(sizeof(*conn_state), GFP_KERNEL);
  51         if (!conn_state)
  52                 return -ENOMEM;
  53
  54         __drm_atomic_helper_connector_reset(&connector->base,
  55                                             &conn_state->base);
  56
  57         INIT_LIST_HEAD(&connector->panel.fixed_modes);
  58
  59         return 0;
  60 }
  61
  62 struct intel_connector *intel_connector_alloc(void)
  63 {
  64         struct intel_connector *connector;
  65
  66         connector = kzalloc(sizeof(*connector), GFP_KERNEL);
  67         if (!connector)
  68                 return NULL;
  69
  70         if (intel_connector_init(connector) < 0) {
  71                 kfree(connector);
  72                 return NULL;
  73         }
  74
  75         return connector;
  76 }
  77
  78 /*
  79  * Free the bits allocated by intel_connector_alloc.
  80  * This should only be used after intel_connector_alloc has returned
  81  * successfully, and before drm_connector_init returns successfully.
  82  * Otherwise the destroy callbacks for the connector and the state should
  83  * take care of proper cleanup/free (see intel_connector_destroy).
  84  */
  85 void intel_connector_free(struct intel_connector *connector)
  86 {
  87         kfree(to_intel_digital_connector_state(connector->base.state));
  88         kfree(connector);
  89 }
  90
  91 /*
  92  * Connector type independent destroy hook for drm_connector_funcs.
  93  */
  94 void intel_connector_destroy(struct drm_connector *connector)
  95 {
  96         struct intel_connector *intel_connector = to_intel_connector(connector);
  97
  98         kfree(intel_connector->detect_edid);
  99
 100         intel_hdcp_cleanup(intel_connector);
 101
 102         if (!IS_ERR_OR_NULL(intel_connector->edid))
 103                 kfree(intel_connector->edid);
 104
 105         intel_panel_fini(intel_connector);
 106
 107         drm_connector_cleanup(connector);
 108
 109         if (intel_connector->port)
 110                 drm_dp_mst_put_port_malloc(intel_connector->port);
 111
 112         kfree(connector);
 113 }
 114
 115 int intel_connector_register(struct drm_connector *connector)
 116 {
 117         struct intel_connector *intel_connector = to_intel_connector(connector);
 118         int ret;
 119
 120         ret = intel_backlight_device_register(intel_connector);
 121         if (ret)
 122                 goto err;
 123
 124         if (i915_inject_probe_failure(to_i915(connector->dev))) {
 125                 ret = -EFAULT;
 126                 goto err_backlight;
 127         }
 128
 129         intel_connector_debugfs_add(intel_connector);
 130
 131         return 0;
 132
 133 err_backlight:
 134         intel_backlight_device_unregister(intel_connector);
 135 err:
 136         return ret;
 137 }
 138
 139 void intel_connector_unregister(struct drm_connector *connector)
 140 {
 141         struct intel_connector *intel_connector = to_intel_connector(connector);
 142
 143         intel_backlight_device_unregister(intel_connector);
 144 }
 145
 146 void intel_connector_attach_encoder(struct intel_connector *connector,
 147                                     struct intel_encoder *encoder)
 148 {
 149         connector->encoder = encoder;
 150         drm_connector_attach_encoder(&connector->base, &encoder->base);
 151 }
 152
 153 /*
 154  * Simple connector->get_hw_state implementation for encoders that support only
 155  * one connector and no cloning and hence the encoder state determines the state
 156  * of the connector.
 157  */
 158 bool intel_connector_get_hw_state(struct intel_connector *connector)
 159 {
 160         enum pipe pipe = 0;
 161         struct intel_encoder *encoder = intel_attached_encoder(connector);
 162
 163         return encoder->get_hw_state(encoder, &pipe);
 164 }
 165
 166 enum pipe intel_connector_get_pipe(struct intel_connector *connector)
 167 {
 168         struct drm_device *dev = connector->base.dev;
 169
 170         drm_WARN_ON(dev,
 171                     !drm_modeset_is_locked(&dev->mode_config.connection_mutex));
 172
 173         if (!connector->base.state->crtc)
 174                 return INVALID_PIPE;
 175
 176         return to_intel_crtc(connector->base.state->crtc)->pipe;
 177 }
 178
 179 /**
 180  * intel_connector_update_modes - update connector from edid
 181  * @connector: DRM connector device to use
 182  * @edid: previously read EDID information
 183  */
 184 int intel_connector_update_modes(struct drm_connector *connector,
 185                                 struct edid *edid)
 186 {
 187         int ret;
 188
 189         drm_connector_update_edid_property(connector, edid);
 190         ret = drm_add_edid_modes(connector, edid);
 191
 192         return ret;
 193 }
 194
 195 /**
 196  * intel_ddc_get_modes - get modelist from monitor
 197  * @connector: DRM connector device to use
 198  * @adapter: i2c adapter
 199  *
 200  * Fetch the EDID information from @connector using the DDC bus.
 201  */
 202 int intel_ddc_get_modes(struct drm_connector *connector,
 203                         struct i2c_adapter *adapter)
 204 {
 205         struct edid *edid;
 206         int ret;
 207
 208         edid = drm_get_edid(connector, adapter);
 209         if (!edid)
 210                 return 0;
 211
 212         ret = intel_connector_update_modes(connector, edid);
 213         kfree(edid);
 214
 215         return ret;
 216 }
 217
 218 static const struct drm_prop_enum_list force_audio_names[] = {
 219         { HDMI_AUDIO_OFF_DVI, "force-dvi" },
 220         { HDMI_AUDIO_OFF, "off" },
 221         { HDMI_AUDIO_AUTO, "auto" },
 222         { HDMI_AUDIO_ON, "on" },
 223 };
 224
 225 void
 226 intel_attach_force_audio_property(struct drm_connector *connector)
 227 {
 228         struct drm_device *dev = connector->dev;
 229         struct drm_i915_private *dev_priv = to_i915(dev);
 230         struct drm_property *prop;
 231
 232         prop = dev_priv->force_audio_property;
 233         if (prop == NULL) {
 234                 prop = drm_property_create_enum(dev, 0,
 235                                            "audio",
 236                                            force_audio_names,
 237                                            ARRAY_SIZE(force_audio_names));
 238                 if (prop == NULL)
 239                         return;
 240
 241                 dev_priv->force_audio_property = prop;
 242         }
 243         drm_object_attach_property(&connector->base, prop, 0);
 244 }
 245
 246 static const struct drm_prop_enum_list broadcast_rgb_names[] = {
 247         { INTEL_BROADCAST_RGB_AUTO, "Automatic" },
 248         { INTEL_BROADCAST_RGB_FULL, "Full" },
 249         { INTEL_BROADCAST_RGB_LIMITED, "Limited 16:235" },
 250 };
 251
 252 void
 253 intel_attach_broadcast_rgb_property(struct drm_connector *connector)
 254 {
 255         struct drm_device *dev = connector->dev;
 256         struct drm_i915_private *dev_priv = to_i915(dev);
 257         struct drm_property *prop;
 258
 259         prop = dev_priv->broadcast_rgb_property;
 260         if (prop == NULL) {
 261                 prop = drm_property_create_enum(dev, DRM_MODE_PROP_ENUM,
 262                                            "Broadcast RGB",
 263                                            broadcast_rgb_names,
 264                                            ARRAY_SIZE(broadcast_rgb_names));
 265                 if (prop == NULL)
 266                         return;
 267
 268                 dev_priv->broadcast_rgb_property = prop;
 269         }
 270
 271         drm_object_attach_property(&connector->base, prop, 0);
 272 }
 273
 274 void
 275 intel_attach_aspect_ratio_property(struct drm_connector *connector)
 276 {
 277         if (!drm_mode_create_aspect_ratio_property(connector->dev))
 278                 drm_object_attach_property(&connector->base,
 279                         connector->dev->mode_config.aspect_ratio_property,
 280                         DRM_MODE_PICTURE_ASPECT_NONE);
 281 }
 282
 283 void
 284 intel_attach_hdmi_colorspace_property(struct drm_connector *connector)
 285 {
 286         if (!drm_mode_create_hdmi_colorspace_property(connector))
 287                 drm_connector_attach_colorspace_property(connector);
 288 }
 289
 290 void
 291 intel_attach_dp_colorspace_property(struct drm_connector *connector)
 292 {
 293         if (!drm_mode_create_dp_colorspace_property(connector))
 294                 drm_connector_attach_colorspace_property(connector);
 295 }